Johnson has been impressive in Man City's fine start to the season

The 19-year-old has been a regular under new boss Sven-Goran Eriksson and was a summer target for Liverpool.

Johnson scored his first goal for the club in the 1-0 win against Derby, and earned his first under-21 cap in the 1-1 draw against Romania.

Young defender Shaleum Logan has also signed a new three-year contract with City as Eriksson builds for the future.

City's chief executive Alistair Mackintosh said: "In awarding new contracts to Michael and Shaleum we are once again demonstrating Manchester City's commitment to investing in our young, home-grown players.

606: DEBATE Surely this is great news for the club and shows their ambition for the years to come IW

"With a spine of hugely-talented academy-bred youngsters we have made an excellent start to the season and are delighted to have secured the long-term futures of both players at this football club."